Users often don’t invest enough time into their messages, resulting in incomplete, unprofessional, or otherwise under-whelming greetings. Sure, crafting a greeting doesn’t sound all that complicated; however, there are a number of pitfalls users can fall into—i.e. informality, terseness, sincerity, lack of direction, and more. While none of these sound too catastrophic, they are often interrelated. As such, they tend to worsen any problem. For example, humor can cause informality, worsen ambiguity, and weaken sincerity. That being said, users should strive to avoid ALL these pitfalls.
If your caller has left you a detailed message with their query, it enables you to get straight down to business when you reply.

3.) Bem-vindo a John Doe. No momento não podemos atender a sua ligação ou você está nos ligando fora do horário comercial. Por favor, deixe uma mensagem com seu nome e número de telefone que vamos ligá-lo de volta o mais rápido possível. Obrigado e até breve.
I recommend Sound Telecom to anyone who wants their phones answered by a living, breathing person who is professional and courteous at all times. When I need to forward my calls, it is a stress-free experience.